diff --git a/SeedDMS_Core/Core.php b/SeedDMS_Core/Core.php
index 0f7b956ea..d9ae9b206 100644
--- a/SeedDMS_Core/Core.php
+++ b/SeedDMS_Core/Core.php
@@ -96,4 +96,9 @@ require_once('Core/inc.FileUtils.php');
  */
 require_once('Core/inc.ClassTransmittal.php');
 
+/**
+ * @uses SeedDMS_DownloadLink
+ */
+require_once('Core/inc.ClassDownloadLink.php');
+
 ?>
diff --git a/SeedDMS_Core/Core/inc.ClassDownloadLink.php b/SeedDMS_Core/Core/inc.ClassDownloadLink.php
new file mode 100644
index 000000000..213518fc6
--- /dev/null
+++ b/SeedDMS_Core/Core/inc.ClassDownloadLink.php
@@ -0,0 +1,123 @@
+<?php
+/**
+ * Implementation of a document in the document management system
+ *
+ * @category   DMS
+ * @package    SeedDMS_Core
+ * @license    GPL2
+ * @author     Markus Westphal, Malcolm Cowe, Matteo Lucarelli,
+ *             Uwe Steinmann <uwe@steinmann.cx>
+ * @copyright  Copyright (C) 2002-2005 Markus Westphal, 2006-2008 Malcolm Cowe,
+ *             2010 Matteo Lucarelli, 2010 Uwe Steinmann
+ * @version    Release: @package_version@
+ */
+
+/**
+ * Class to represent a download link in the document management system
+ *
+ * Download links are access rights to a particular document version.
+ *
+ * @category   DMS
+ * @package    SeedDMS_Core
+ * @author     Uwe Steinmann <uwe@steinmann.cx>
+ * @copyright  Copyright (C) 2016 Uwe Steinmann
+ * @version    Release: @package_version@
+ */
+class SeedDMS_Core_DownloadLink { /* {{{ */
+	/**
+	 * @var integer unique id of object
+	 */
+	protected $_id;
+
+	/**
+	 * @var object document belonging to link
+	 */
+	protected $_document;
+
+	/**
+	 * @var integer version of document
+	 */
+	protected $_version;
+
+	/**
+	 * @var object user owning the document link
+	 */
+	protected $_user;
+
+	/**
+	 * @var string hash of document link
+	 */
+	protected $_hash;
+
+	/**
+	 * @var date date till links valid
+	 */
+	protected $_valid;
+
+	/**
+	 * @var object back reference to document management system
+	 */
+	public $_dms;
+
+	function __construct($id, $document, $version, $user, $hash, $valid) { /* {{{ */
+		$this->_id = $id;
+		$this->_dms = null;
+		$this->_document = $document;
+		$this->_version = $version;
+		$this->_user = $user;
+		$this->_hash = $hash;
+		$this->_valid = $valid;
+	} /* }}} */
+
+	private static function __getInstance($queryStr, $dms) { /* {{{ */
+		$db = $dms->getDB();
+		$resArr = $db->getResultArray($queryStr);
+		if (is_bool($resArr) && $resArr == false)
+			return false;
+		if (count($resArr) != 1)
+			return false;
+		$resArr = $resArr[0];
+
+		$document = $dms->getDocument($resArr['document']);
+		$user = $dms->getUser($resArr['user']);
+
+		$classname = $dms->getClassname('downloadlink');
+		$downloadlink = new $classname($resArr["id"], $document, $resArr["version"], $user, $resArr["hash"], $resArr["valid"]);
+		$downloadlink->setDMS($dms);
+		return $downloadlink;
+	} /* }}} */
+
+	public static function getInstance($id, $dms) { /* {{{ */
+		$queryStr = "SELECT * FROM tblDownloadLinks WHERE id = " . (int) $id;
+		return self::__getInstance($queryStr, $dms);
+	} /* }}} */
+
+	public static function getInstanceByHash($hash, $dms) { /* {{{ */
+		$queryStr = "SELECT * FROM tblDownloadLinks WHERE hash = " . $db->qstr($hash);
+		return self::__getInstance($queryStr, $dms);
+	} /* }}} */
+
+	/*
+	 * Set dms this object belongs to.
+	 *
+	 * Each object needs a reference to the dms it belongs to. It will be
+	 * set when the object is created.
+	 * The dms has a references to the currently logged in user
+	 * and the database connection.
+	 *
+	 * @param object $dms reference to dms
+	 */
+	function setDMS($dms) { /* {{{ */
+		$this->_dms = $dms;
+	} /* }}} */
+
+	/**
+	 * Return owner of document link
+	 *
+	 * @return object owner of document link as an instance of {@link SeedDMS_Core_User}
+	 */
+	function getUser() { /* {{{ */
+		return $this->_user;
+	} /* }}} */
+
+} /* }}} */